May weather forecast
Fountain Valley, CA

Weather in May

The last month of the spring, May, is a pleasant month in Fountain Valley, California, with an average temperature varying between 68.7°F (20.4°C) and 56.8°F (13.8°C).

Temperature

In May, the average high-temperature is practically the same as in April - an agreeable 68.7°F (20.4°C). In May, the average low-temperature is 56.8°F (13.8°C).

Humidity

In May, the average relative humidity in Fountain Valley is 69%.

Rainfall

In Fountain Valley, it is raining for 4.7 days, with typically 0.28" (7mm) of accumulated precipitation. Throughout the year, there are 59.1 rainfall days, and 8.86" (225mm) of precipitation is accumulated.

Daylight

In May, the average length of the day in Fountain Valley, California, is 13h and 55min.
On the first day of May, sunrise is at 6:02 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 7:56 pm PDT.

Sunshine

The average sunshine in May is 11.1h.

UV index

In Fountain Valley, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in Fountain Valley?

In Fountain Valley, in May, the average high-temperature is 68.7°F (20.4°C), and the average low-temperature is 56.8°F (13.8°C).

What is the average humidity in May in Fountain Valley?

In May, the average relative humidity in Fountain Valley is 69%.

How much does it rain in Fountain Valley in May?

In Fountain Valley, California, in May, it is raining for 4.7 days, with typically 0.28" (7mm) of accumulated precipitation.

How many hours of daylight does Fountain Valley have in May?

In May, the average day length in Fountain Valley is 13h and 55min.

When are sunrise and sunset in May in Fountain Valley?

In May, on the first day of the month, sunrise is at 6:02 am and sunset at 7:34 pm. On the last day of the month, in Fountain Valley, sunrise is at 5:42 am and sunset at 7:56 pm PDT.

How many hours of sunshine does Fountain Valley have in May?

In May, the average sunshine duration in Fountain Valley, California, is 11.1h.

What is the UV index intensity in May in Fountain Valley?

In May, the average daily maximum UV index in Fountain Valley, California, is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Fountain Valley, CA

Average temperature in May - Fountain Valley, CA
  • Average high temperature in May: 68.7°F

The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (62.6°F).

  • Average low temperature in May: 56.8°F

The month with the highest average low temperature is August (65.1°F).
The coldest month (with the lowest average low temperature) is February (51.8°F).

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Average pressure in May
Fountain Valley, CA

Average pressure in May - Fountain Valley, CA
  • Average pressure in May: 29.93"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).

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Average wind speed in May
Fountain Valley, CA

Average wind speed in May - Fountain Valley, CA
  • Average wind speed in May: 6.3mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (5.2mph).

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Average humidity in May
Fountain Valley, CA

Average humidity in May - Fountain Valley, CA
  • Average humidity in May: 69%

The month with the highest relative humidity is June (72%).
The month with the lowest relative humidity is November (56%).

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Average rainfall in May
Fountain Valley, CA

Average rainfall in May - Fountain Valley, CA
  • Average rainfall in May: 0.28"

The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in May
Fountain Valley, CA

Average rainfall days in May - Fountain Valley, CA
  • Average rainfall days in May: 4.7 days

The month with the highest number of rainy days is March (7.9 days).
The month with the least rainy days is August (2.1 days).

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Average daylight in May /
Average sunshine in May
Fountain Valley, CA

Average daylight in May / Average sunshine in May - Fountain Valley, CA
  • Average daylight in May: 13h and 55min

The month with the longest days is June (Average daylight: 14h and 22min).
The month with the shortest days is December (Average daylight: 9h and 58min).

  • Average sunshine in May: 11h and 6min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in May
Fountain Valley, CA

Average sunshine days in May - Fountain Valley, CA
  • Average sunshine days in May: 22.8 days

The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is February (20 days).

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Average UV index in May
Fountain Valley, CA

Average UV index in May - Fountain Valley, CA
  • Average UV index in May: 5

The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in May
Fountain Valley, CA

Average cloud cover in May - Fountain Valley, CA
  • Average cloud cover in May: 19

The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 7).

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Average visibility in May
Fountain Valley, CA

Average visibility in May - Fountain Valley, CA
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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